Taper shank drill bits, Throw-Away Inserts Multifork drill bits.

Specification:

1. Shank material: HSS; Blade material: Carbide ally + TiN coatted.

2. Bright finish.

3. The blade insert is free grainding. Let's take 45#steel, HRC30 and calculate by N=180r/min, F=0.112mm/r for exsample, a microcreate blade can make 148holes, an another domestic drill can only make 179holes but it has to resharpen 10times. Our new invention is really saved your time and cost; Improved your work efficiency.

4. This Throw-away inserts multifork drill has excellent chip deviding, breaking off and discharging ability.

5. The inner wall of hole made by Throw-Away insrts multifork drill is more smooth than other ordinary made one.